Design of Gating & Runner system in Gravity Die Casting
2019年6月15日 · Riser design is at least as important as gate design. The consideration of relative volumes is critical in riser design, not much in gate and runner design. For investment casting smaller parts ( such as 1 in. typical dimension) steels , the runners and sprue provide the riser : ( Very similar to permanent mold casting).
What is the characterising difference between a riser and a runner?
2021年3月19日 · A riser is a static reserve volume of metal available to flow into the casting to compensate for shrinkage as the liquid freezes. Risers are relatively large because they should not freeze until after the casting has frozen. Risers may be "hot topped", exothermic material is put on to provide extra heat to keep the riser liquid as long as possible.
What are the design principles for risers in sand casting?
What results is referred to as "under-riser shrinkage porosity". Increasing the size of the feeder, or changing its location relative to the section, can help resolve this issue. A common rule is to use a feeder whose diameter (via Heuvers' circles or spheres) or section modulus (care of Chvorinov, Wlodawer, et al.) is 1.0 to 1.2 times that of ...
How to stop water flow in a siphon? - Engineering Stack Exchange
2016年4月28日 · Install a tee and riser at the highest point of the pipe. this will need to be high enough to avoid the pump pressure pumping water out of the riser. Install a vacuum breaker valve. This is basically a non-return valve, letting air into the pipe but not letting water out. direct the outlet of the pump to a high point via a short tube.
renewable energy - I want to determine the flow rate and required ...
2021年5月1日 · Riser A = 500m. Riser B = 50m. Pipeline L = 10000m. Pipeline, Riser A/B Diameter = 500mm. Any help would be appreciated, because I'm stuck in a bit of a rut finding the connection between the two as I'm using two different ideas and joining them. Also for reference the ESP will be powered using excess energy from a wind turbine (not shown).
mechanical engineering - How to calculate riser dimensions given …
2020年6月13日 · However , there are still matters like "hot tops" ( exothermic riser topping,) superheat ( adjusted for pattern complexity), length and thickness of thin sections, etc. Mold temperature and composition of the sand. That is; the same weight of steel may be poured at different temperatures depending on the pattern and other factors.
structural analysis - Why do stress concentrations really occur ...
2019年3月23日 · $\begingroup$ In the elastic regime I imagine each element is assumed to be subject to linear elasticity. That is, stress and strain are both represented by symmetric 3x3 matrices, with a 3x3x3x3 symmetric tensor of stiffness or compliance constants (depending on stress to strain or strain to stress) relating the matrices.
Production Technology castin - Engineering Stack Exchange
The volume of the riser located along the runner near the mold cavity = 25 in3. It takes a total of 3.0 sec to fill the entire mold (including cavity, riser, runner, and sprue). This is more than the theoretical time required, indicating a loss of velocity due to friction in the sprue and runner.
Calculate torque for a cam - Engineering Stack Exchange
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civil engineering - Hydraulics sluice gates and hydraulic jumps ...
2023年1月14日 · An hydraulic jump is localized turbulence that dissipates kinetic energy. To understand how much kinteic energy requires a knowledge of the potential energy before the gate and after the gate to calculate the hydraulic jump wave celerity.